My area is already struggling with hospitals being on overflow. It’s not feasible or possible for a whole hospital to shut down and transfer out their patients to other hospitals- the beds aren’t available. Patients still need the care, so when nurses strike there will be scab nurses.
If workers of a large retailer, such as Target, were union and went on strike there would be no way to justify scab workers in that scenario- they’re not essential personnel and not being able to go to Target is not going to possibly result in death (although many people, myself included, would be lost and in withdraw).
I don’t live in an area with many unions, so a nurses strike would be very very rare. My facility is not union, so this isn’t a situation I have to worry or be concerned about.